[Numpy-discussion] strange runtimes of numpy fft

[Nathaniel Smith]

On Tue, Nov 19, 2013 at 9:17 AM, Henry Gomersall <heng at cantab.net> wrote:
> On 19/11/13 16:08, Stéfan van der Walt wrote:
>> On Tue, Nov 19, 2013 at 6:03 PM, Henry Gomersall<heng at cantab.net>  wrote:
>>> >However, FFTW is dual licensed GPL/commercial and so the wrappers are
>>> >also GPL by necessity.
>> I'm not sure if that is true, strictly speaking--you may license your
>> wrapper code under any license you wish.  It's just that it becomes
>> confusing when the combined work then has to be released under GPL.
>
> This is on shaky GPL ground. I'm inclined to agree with you, but given
> any usage necessarily has to link against the FFTW libs, any resultant
> redistribution is going to be GPL by necessity. I.e. pyFFTW is useless
> without FFTW so it's just simpler to make it GPL for the time being.

The case where it makes a difference is when someone has purchased a
commercial license to FFTW and then wants to use it from their
proprietary Python application.

-n